// Helper function for the normalize() mixin. @function _normalize-include($section, $exclude: null) {

// Initialize the global variables needed by this function.
@if not global_variable_exists(_normalize-include) {
  $_normalize-include: () !global;
  $_normalize-exclude: () !global;
}
// Since we are given 2 parameters, set the global variables.
@if $exclude != null {
  $include: $section;
  // Sass doesn't have static variables, so the work-around is to stuff these
  // values into global variables so we can access them in future calls.
  $_normalize-include: if(type-of($include) == 'list', $include, ($include)) !global;
  $_normalize-exclude: if(type-of($exclude) == 'list', $exclude, ($exclude)) !global;
  @return true;
}

// Check if $section is in the $include list.
@if index($_normalize-include, $section) {
  @return true;
}
// If $include is set to (all), make sure $section is not in $exclude.
@else if not index($_normalize-exclude, $section) and index($_normalize-include, all) {
  @return true;
}
@return false;

}

@mixin normalize($include: (all), $exclude: ()) {

// Initialize the helper function by passing it this mixin's parameters.
$init: _normalize-include($include, $exclude);

// If we've customized any font variables, we'll need extra properties.
@if $base-font-size != 16px
  or $base-line-height != 24px
  or $base-unit != 'em'
  or $h1-font-size != 2    * $base-font-size
  or $h2-font-size != 1.5  * $base-font-size
  or $h3-font-size != 1.17 * $base-font-size
  or $h4-font-size != 1    * $base-font-size
  or $h5-font-size != 0.83 * $base-font-size
  or $h6-font-size != 0.67 * $base-font-size {
  $normalize-vertical-rhythm: true !global;
}

/*! normalize-scss | MIT/GPLv2 License | bit.ly/normalize-scss */

@if _normalize-include(document) {
  /* Document
     ========================================================================== */

  /**
   * 1. Change the default font family in all browsers (opinionated).
   * 2. Correct the line height in all browsers.
   * 3. Prevent adjustments of font size after orientation changes in
   *    IE on Windows Phone and in iOS.
   */

  html {
    font-family: $base-font-family; /* 1 */
    @if $normalize-vertical-rhythm {
      // Correct old browser bug that prevented accessible resizing of text
      // when root font-size is set with px or em.
      font-size: ($base-font-size / 16px) * 100%;
      line-height: ($base-line-height / $base-font-size) * 1em; /* 2 */
    }
    @else {
      line-height: 1.15; /* 2 */
    }
    -ms-text-size-adjust: 100%; /* 3 */
    -webkit-text-size-adjust: 100%; /* 3 */
  }
}

@if _normalize-include(sections) {
  /* Sections
     ========================================================================== */

  /**
   * Remove the margin in all browsers (opinionated).
   */

  body {
    margin: 0;
  }

  /**
   * Add the correct display in IE 9-.
   */

  article,
  aside,
  footer,
  header,
  nav,
  section {
    display: block;
  }

  /**
   * Correct the font size and margin on `h1` elements within `section` and
   * `article` contexts in Chrome, Firefox, and Safari.
   */

  h1 {
    @include normalize-font-size($h1-font-size);
    @if $normalize-vertical-rhythm {
      @include normalize-line-height($h1-font-size);
    }

    @if $normalize-vertical-rhythm {
      /* Set 1 unit of vertical rhythm on the top and bottom margins. */
      @include normalize-margin(1 0, $h1-font-size);
    }
    @else {
      margin: 0.67em 0;
    }
  }

  @if $normalize-vertical-rhythm {
    h2 {
      @include normalize-font-size($h2-font-size);
      @include normalize-line-height($h2-font-size);
      @include normalize-margin(1 0, $h2-font-size);
    }

    h3 {
      @include normalize-font-size($h3-font-size);
      @include normalize-line-height($h3-font-size);
      @include normalize-margin(1 0, $h3-font-size);
    }

    h4 {
      @include normalize-font-size($h4-font-size);
      @include normalize-line-height($h4-font-size);
      @include normalize-margin(1 0, $h4-font-size);
    }

    h5 {
      @include normalize-font-size($h5-font-size);
      @include normalize-line-height($h5-font-size);
      @include normalize-margin(1 0, $h5-font-size);
    }

    h6 {
      @include normalize-font-size($h6-font-size);
      @include normalize-line-height($h6-font-size);
      @include normalize-margin(1 0, $h6-font-size);
    }
  }
}

@if _normalize-include(grouping) {
  /* Grouping content
     ========================================================================== */

  @if $normalize-vertical-rhythm {
    /**
     * Set 1 unit of vertical rhythm on the top and bottom margin.
     */

    blockquote {
      @include normalize-margin(1 $indent-amount);
    }

    dl,
    ol,
    ul {
      @include normalize-margin(1 0);
    }

    /**
     * Turn off margins on nested lists.
     */

    ol,
    ul {
      ol,
      ul {
        margin: 0;
      }
    }

    dd {
      margin: 0 0 0 $indent-amount;
    }

    ol,
    ul {
      padding: 0 0 0 $indent-amount;
    }
  }

  /**
   * Add the correct display in IE 9-.
   */

  figcaption,
  figure {
    display: block;
  }

  /**
   * Add the correct margin in IE 8.
   */

  figure {
    @if $normalize-vertical-rhythm {
      @include normalize-margin(1 $indent-amount);
    }
    @else {
      margin: 1em $indent-amount;
    }
  }

  /**
   * 1. Add the correct box sizing in Firefox.
   * 2. Show the overflow in Edge and IE.
   */

  hr {
    box-sizing: content-box; /* 1 */
    height: 0; /* 1 */
    overflow: visible; /* 2 */
  }

  /**
   * Add the correct display in IE.
   */

  main {
    display: block;
  }

  @if $normalize-vertical-rhythm {
    /**
     * Set 1 unit of vertical rhythm on the top and bottom margin.
     */

    p,
    pre {
      @include normalize-margin(1 0);
    }
  }

  /**
   * 1. Correct the inheritance and scaling of font size in all browsers.
   * 2. Correct the odd `em` font sizing in all browsers.
   */

  pre {
    font-family: monospace, monospace; /* 1 */
    font-size: 1em; /* 2 */
  }
}

@if _normalize-include(links) {
  /* Links
     ========================================================================== */

  /**
   * 1. Remove the gray background on active links in IE 10.
   * 2. Remove gaps in links underline in iOS 8+ and Safari 8+.
   */

  a {
    background-color: transparent; /* 1 */
    -webkit-text-decoration-skip: objects; /* 2 */
  }

  /**
   * Remove the outline on focused links when they are also active or hovered
   * in all browsers (opinionated).
   */

  a:active,
  a:hover {
    outline-width: 0;
  }
}

@if _normalize-include(text) {
  /* Text-level semantics
     ========================================================================== */

  /**
   * 1. Remove the bottom border in Firefox 39-.
   * 2. Add the correct text decoration in Chrome, Edge, IE, Opera, and Safari.
   */

  abbr[title] {
    border-bottom: none; /* 1 */
    text-decoration: underline; /* 2 */
    text-decoration: underline dotted; /* 2 */
  }

  /**
   * Prevent the duplicate application of `bolder` by the next rule in Safari 6.
   */

  b,
  strong {
    font-weight: inherit;
  }

  /**
   * Add the correct font weight in Chrome, Edge, and Safari.
   */

  b,
  strong {
    font-weight: bolder;
  }

  /**
   * 1. Correct the inheritance and scaling of font size in all browsers.
   * 2. Correct the odd `em` font sizing in all browsers.
   */

  code,
  kbd,
  samp {
    font-family: monospace, monospace; /* 1 */
    font-size: 1em; /* 2 */
  }

  /**
   * Add the correct font style in Android 4.3-.
   */

  dfn {
    font-style: italic;
  }

  /**
   * Add the correct background and color in IE 9-.
   */

  mark {
    background-color: #ff0;
    color: #000;
  }

  /**
   * Add the correct font size in all browsers.
   */

  small {
    font-size: 80%;
  }

  /**
   * Prevent `sub` and `sup` elements from affecting the line height in
   * all browsers.
   */

  sub,
  sup {
    font-size: 75%;
    line-height: 0;
    position: relative;
    vertical-align: baseline;
  }

  sub {
    bottom: -0.25em;
  }

  sup {
    top: -0.5em;
  }
}

@if _normalize-include(embedded) {
  /* Embedded content
     ========================================================================== */

  /**
   * Add the correct display in IE 9-.
   */

  audio,
  video {
    display: inline-block;
  }

  /**
   * Add the correct display in iOS 4-7.
   */

  audio:not([controls]) {
    display: none;
    height: 0;
  }

  /**
   * Remove the border on images inside links in IE 10-.
   */

  img {
    border-style: none;
  }

  /**
   * Hide the overflow in IE.
   */

  svg:not(:root) {
    overflow: hidden;
  }
}

@if _normalize-include(forms) {
  /* Forms
     ========================================================================== */

  /**
   * 1. Change the font styles in all browsers (opinionated).
   * 2. Remove the margin in Firefox and Safari.
   */

  button,
  input,
  optgroup,
  select,
  textarea {
    font-family: $base-font-family; /* 1 */
    font-size: 100%; /* 1 */
    @if $normalize-vertical-rhythm {
      line-height: ($base-line-height / $base-font-size) * 1em; /* 1 */
    }
    @else {
      line-height: 1.15; /* 1 */
    }
    margin: 0; /* 2 */
  }

  /**
   * Show the overflow in IE.
   */

  button {
    overflow: visible;
  }

  /**
   * Remove the inheritance of text transform in Edge, Firefox, and IE.
   * 1. Remove the inheritance of text transform in Firefox.
   */

  button,
  select { /* 1 */
    text-transform: none;
  }

  /**
   * 1. Prevent a WebKit bug where (2) destroys native `audio` and `video`
   *    controls in Android 4.
   * 2. Correct the inability to style clickable types in iOS and Safari.
   */

  button,
  html [type="button"], /* 1 */
  [type="reset"],
  [type="submit"] {
    -webkit-appearance: button; /* 2 */
  }

  button,
  [type="button"],
  [type="reset"],
  [type="submit"] {

    /**
     * Remove the inner border and padding in Firefox.
     */

    &::-moz-focus-inner {
      border-style: none;
      padding: 0;
    }

    /**
     * Restore the focus styles unset by the previous rule.
     */

    &:-moz-focusring {
      outline: 1px dotted ButtonText;
    }
  }

  /**
   * Show the overflow in Edge.
   */

  input {
    overflow: visible;
  }

  /**
   * 1. Add the correct box sizing in IE 10-.
   * 2. Remove the padding in IE 10-.
   */

  [type="checkbox"],
  [type="radio"] {
    box-sizing: border-box; /* 1 */
    padding: 0; /* 2 */
  }

  /**
   * Correct the cursor style of increment and decrement buttons in Chrome.
   */

  [type="number"]::-webkit-inner-spin-button,
  [type="number"]::-webkit-outer-spin-button {
    height: auto;
  }

  /**
   * 1. Correct the odd appearance in Chrome and Safari.
   * 2. Correct the outline style in Safari.
   */

  [type="search"] {
    -webkit-appearance: textfield; /* 1 */
    outline-offset: -2px; /* 2 */

    /**
     * Remove the inner padding and cancel buttons in Chrome and Safari on macOS.
     */

    &::-webkit-search-cancel-button,
    &::-webkit-search-decoration {
      -webkit-appearance: none;
    }
  }

  /**
   * 1. Correct the inability to style clickable types in iOS and Safari.
   * 2. Change font properties to `inherit` in Safari.
   */

  ::-webkit-file-upload-button {
    -webkit-appearance: button; /* 1 */
    font: inherit; /* 2 */
  }

  /**
   * Change the border, margin, and padding in all browsers (opinionated).
   */

  fieldset {
    border: 1px solid #c0c0c0;
    margin: 0 2px;
    padding: 0.35em 0.625em 0.75em;
  }

  /**
   * 1. Correct the text wrapping in Edge and IE.
   * 2. Correct the color inheritance from `fieldset` elements in IE.
   * 3. Remove the padding so developers are not caught out when they zero out
   *    `fieldset` elements in all browsers.
   */

  legend {
    box-sizing: border-box; /* 1 */
    display: table; /* 1 */
    max-width: 100%; /* 1 */
    padding: 0; /* 3 */
    color: inherit; /* 2 */
    white-space: normal; /* 1 */
  }

  /**
   * 1. Add the correct display in IE 9-.
   * 2. Add the correct vertical alignment in Chrome, Firefox, and Opera.
   */

  progress {
    display: inline-block; /* 1 */
    vertical-align: baseline; /* 2 */
  }

  /**
   * Remove the default vertical scrollbar in IE.
   */

  textarea {
    overflow: auto;
  }
}

@if _normalize-include(interactive) {
  /* Interactive
     ========================================================================== */

  /*
   * Add the correct display in Edge, IE, and Firefox.
   */

  details {
    display: block;
  }

  /*
   * Add the correct display in all browsers.
   */

  summary {
    display: list-item;
  }

  /*
   * Add the correct display in IE 9-.
   */

  menu {
    display: block;

    @if $normalize-vertical-rhythm {
      /*
       * 1. Set 1 unit of vertical rhythm on the top and bottom margin.
       * 2. Set consistent space for the list style image.
       */

      @include normalize-margin(1 0); /* 1 */
      padding: 0 0 0 $indent-amount; /* 2 */

      /**
       * Turn off margins on nested lists.
       */

      menu &,
      ol &,
      ul & {
        margin: 0;
      }
    }
  }
}

@if _normalize-include(scripting) {
  /* Scripting
     ========================================================================== */

  /**
   * Add the correct display in IE 9-.
   */

  canvas {
    display: inline-block;
  }

  /**
   * Add the correct display in IE.
   */

  template {
    display: none;
  }
}

@if _normalize-include(hidden) {
  /* Hidden
     ========================================================================== */

  /**
   * Add the correct display in IE 10-.
   */

  [hidden] {
    display: none;
  }
}

}